Rung lock for a ladder



FIG. 1 is an upper perspective view of a rung lock for a ladder showingmy new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a rear elevational view thereof; and,

FIG. 8 is a bottom perspective view thereof.

CLAIM The ornamental design for a rung lock for a ladder, as shown anddescribed.